Die-stock



(No Model.)

H. B. GALLOWAY.

DIE STOCK.

WITNESSES:

ATTORNEY N. mans. Pholmljlhogmpher. Wnhingum n. c.

Unrrnn FFICEG HENRY E. GALLOIVAY, OF CHICAGO, ILLINOIS.

DIE-STOCK.

SPECIFICATION forming part of Letters Patent No. 372,664, dated November 8, 1887.

Application filed December 2, 1886. Serial No. 220,536.

To aZZ whom it may concern.-

Be it known that I, HENRY E. GALLOWAY, of Chicago, Oook county, and State of Illinois, have invented certain new and useful Improvements in Die-Stocks; and I do hereby declare that the following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of my invention is to provide a new and useful improvement in tools for threading pipes and bolts, and one in which several dies of different sizes can be placed and utilized without change of parts.

In the drawings, Figure l is a side view of my invention. Fig. 2 is a transverse section on line x 00, Fig. 1. Fig. 3 shows a modification of the arrangement of dies. Fig. 4'is a detail view showing an attachment to said tool, and Fig. 5 shows the manner of its application.

Reference being had to the drawings, A represents a hollow cylindrical boss,having extensions a a at either end, which are tapped, as shown, so that the handles 1) b may be screwed into the same.

Arranged transversely at the longitudinal center of the boss A are a series of circular holes, each alternate one, o c c, of which is,

adapted to receive a die, 0, (similar in every respect to those usually used in this class of tools,) and the others, (I (Z d, of which are adapted to serve as guide-holes for the pipe, the end of which is to be screw-threaded by the die 0, which is arranged diametrically opposite.

Each die O is arranged diametrically opposite a guide-hole, the diameter of which is the same as the diameter of the pipe which said die is designed to screw-thread. By placing in one tool dies of the different sizes generally used by the trade, I can make one tool answer to cut as many different-sized pipes.

In order to secure the dies in position, I screw longitudinally into theend of boss A the set-screws e 6, until they impinge against and securely fasten the dies in position.

It is sometimes desirable to cut a thread on a Very short section of pipe, which could not (No model.)

be done were it necessary to feed the pipe to the dies 0 through their respective guideholes (I. In order to meet this contingency I provide an annulus or ring, E, of a greater diameter, designed to surround boss A,which ring has a series ofguideholes, ff, in it, corresponding in position and diameter to the dies for which they are to serve as guide-holes. I secure this ring E in position by means of set-screws c, which screw into radial holes in the ring E and bear against and enter depressions in the circumferential surface of the boss A; or I provide one edge of the ring E with an inwardly-projccting flange, g, which, when said ring is in position, bears against one side of boss A. Running transversely through this flange, under the ring and through suitable lugs projecting from the opposite side of said ring, are bolts G, which, as they are tightened by thumbnuts h, make the L-arms on their ends opposite said thumb-nuts enter depressions in the side of the boss A, opposite that against which said fiange g bears, and clamp said ring in position. Many different ways could easily be devised for holding said ring in position; but as the ring is the principal feature of this improvement, I desire to be understood as claiming them all.

If desired, the dies and guide-holes, instead of being arranged alternately, as shown, could be made so that the dies would be arranged side by side on one half of the boss and the guideholes diametrically opposite occupying the other half, as shown. I prefer, however, to construct the tool as at first described, be cause the latter arrangement of dies and guideholes would make it necessary, in order to include all the sizes ofdies used in the other, for the boss to be of such a diameter as to render the tool, commercially speaking, impracticable.

IVhat I claim is- 1. A tool for cutting threads on pipes, rods, or bolts, consisting of a cylinder provided with handles projecting axially, one from. each end, said cylinder having a series of radial holes located in the plane passing through its center, each hole being diametrically opposite to another, one of which holes serves to guide the pipe or rod to a die located in the hole opposite, as and for the purpose set forth.

2. A tool for cutting threads on pipes, rods,

or bolts, consisting of a cylinder provided with handles projecting axially,one from each end, said cylinder having a series of radial holes located in the plane passing through its center, each hole being diametrically opposite to another, one of which holes serves to gnidc the pipe or bolt or rod to a die located in a hole opposite, said dies being located in alternate holes, as and for the purpose set forth.

3. The combination, with a screwcutting tool consisting of a cylinder provided With 

